Electric-lighting fixture



Sept. 3, 1929. E. c. WHITE ELECTR IC LIGHTING FIXTURE Filed Oct. 7, 1926INVENTOR.

Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

ERNEST CANTELO WHITE, or New YORK, N. Y., Ass'IeNoR or oNE-HALr TO B.FEN- TON FISHER, or PHILADELPHIA, PENNSYLVANIA.

ELECTRIC-LIGHTING FIXTURE.

Application filed October 7, 1926.

My invention relates to the construction of all types of electriclighting fixtures which include or support a lamp socket and a lampshade.

One of the objects of my present invention is to provide a simpler andmore economical form of combined socket cover and shade holder. Anotherobject is to provide a form of socket cover which may be more quickly 1owired and at the same time provide for its secure support. Anotherobject is to provide for supporting glass shades in such a manner as toallow free expansion of the glass when heated by the lamp and to providefor ventilation. Reference is also made to my copending applicationSerial No. 128,537, filed August 11, 1926, in which I utilize standardsocket interiors with a minimum number of additional parts to form acomplete fixture.

My present invention is alsoa specfic development of this constructionfor the special uses which will be described.

In the accompanying drawings Fig. 1 is the side view of an electrichanging fixture with the upper portion of the cable and the ceilingplate omitted; Fig. 2 is a horizontal View looking upward of the socketcover only; Fig. 3 is a vertical cross section of the parts shown inFig. 1 with the lower portion of the lamp and shade cut away and thetable and socket interior shown in side elevation; Fig. 1 is a top viewof the socket interior only; Fig. 5 is a side view of the shadesupporting ring; Fig. 6 is a horizontal view looking upward of the shadesupporting ring.

In carrying out my invention according to the illustrated embodimentthereof I provide a socket cover 1 of moulded insulating material havingan opening 2 for the passage of what is known in the trade as type SJ2-conductor electric cable 4 and a chamber 3 adapted to accommodate aknot in the cable as shown. I also provide a standard socket interior 5having a base 6 of insulating material formed with two lugs 7, 7extending beyond the diameter of the screwshell of the socket andadapted to fit into two of the four notches 8, 8 8, 8 formed in thesocket cover so as to provide a seat for the said lugs in the socketcover and to prevent rotation of the socket interior with respect to thesocket cover. The lower end of the socket cover is provided with anumber Serial No. 139,991.

of grooves 9 extending through from the inside to the outside thereof. 7

I also provide a shade supporting member 10 having a threaded portion 11adapted to' be passed through an opening ina shade and screw into theinternal threads 12 of the socket cover 1 and having a flange 13 largerthan the opening of the shade to provide a support for the shade. Aflange 13 provided with a member holes 1 1, 141 spaced on a diameterlarger than the threaded portion 11 and smaller than the diameter of theopening in the shade. The shade supporting member 10 also has aninternal cylindrical opening 15 large enough to slip the brassscrew-shell of the socket interior 5 but too small to admit the lugs 7.The length of the shade supporting member is such that when screwed intothe socket cover the end 16 thereof is brought to bear against the lugs7 to seat the socket interior firmly in position in the socket cover andleave a vertical space between the diameter of the socket cover and theflange 13 slightly greater than the thickness of the glass shade 17.

It will thus be evident that the glass shade rests upon the flange 13and is secured against any material displacement therefrom by the end ofthe socket cover but that the shade is not gripped tightly between thesocket cover and the flange 13 and may therefore expand and contractfreely in all changes of temperature.

It will also be observed that there is a ring of space 18 between theedge of the glass shade and the neck of the shade supporting member.This space communicates with the grooves 9 above and the holes 14 belowto provide a series of ventilating ducts through which the heated air onthe inside of the shade may escape. As the space 18 is practicallycontinuous even though the shade be shifted toward one side or the otherof the holder, this ventilating means is effective regardless of theangular position of the holes 1& with respect to the grooves 9. Thesimplicity of my improved construction will be further understood fromthe following description of how it is assembled:

The cable 4 is passed through the opening 2 in the socket cover 1 andout the opposite end. A knot is tied near the end of the cable and thetwo conductors connected. to the terminals 20 of the sea s interior. Thecable is then pulled back into the socket cover until the knot in thecable is seated in the chamber 3 and the socketinterior put into placewith the lugs 7 occupying two of the notches 8. The shade supportingmember 10 is then taken in one hand and inserted through the opening inthe shade and screwed into the socket cover until it seats against thelugs 7. An electric lamp 19 may then be inserted through the opening 15and screwed into the socket.

It should be observed that my improved holder is especially adapted forshades which are open at the bottom or which have a bottom opening largeenough to admit the operators hand to screw the shade supporting memberinto place and also to admit the lamp. The shade is protected againstfalling while being assembled as it is resting on the shade supportingmember and over the operators hand so that the other hand is quite treeto hold 'the socket cover while the shade supporting member is screwedinto it.

It will be understood, of course, that the socketcover 1 may be adaptedfor rigid support on a Wall or ceiling and a material part of myinvention still remain and that vari ous modifications in form andmaterials may be made. The invention herein described includes what Iclaim as new, which is:

1. An electric lighting fixture including a lamp socket member having ascrew-shell, lugs carried by one portion of the socket member andprojecting beyond the diameter of the screw-shell, a socket cover havinga threaded opening at its lower end large enough to pass the'lug bearingportion of the socket'meinber, spaced recesses in the socket cover aboveits threaded opening adapted to accommodate the lugs to prevent rotationof the socket member with respect to'the socket cover when the former isdisposed within the flange to support a shade and spaced openings in theflange adapted to co-operate with the grooves in the socket cover toprovide ventilation for the shade.

8. An electric lighting fixture including a lamp socket member, a socketcover having a threaded opening, radial grooves in the end of the socketcover surrounding the threaded opening, a shade supporting memberadapted to screw into the socket cover and having a flange to support ashade, spaced openings in the flange adapted to co-operate with the radial grooves in the socket cover to provide ventilation for the shade,and means integral with the lamp socket member to provide a stop for theshade holding member when screwed into the socket cover to preventtightening the shade holding member against the shade.

4. An electric lighting fixture comprising a lamp socket member havingradial lugs projecting laterally therefrom and a depending screw-shell,a socket cover having an opening at its lower end for the insertion ofsaid socketmember and its screw shell therein and recesses above saidopening to receive said socket member lugs, and means separable fromsaid socket cover both to retain said socket member in place byengagement with said lugs thereof andto support a lamp shade independing extension from the lower end of said socket cover.

5. An electric lighting fixture comprising a lamp socket member havingradial lugs projecting laterally therefromand a depending screw-shell, asocket cover having an internally threaded opening at its lowerend forthe insertion of said socketmember and its screw shell thereinandrecesses above said opening to receive said socket member lugs,

and a combined socket member retaining means and lamp shade support,comprising an externally threaded sleeve to screw into said internallythreaded opening of said socket cover around said screw-shell and tobear upwardly against said socket member lugs, and an outwardlyextending annular shade-supporting liange at the lower exterior end ofsaid sleeve to underlie said socket cover.

{Signed at New York, N. Y., on this 6th day of'October, 1926.

ERNEST 'GANTELO WHITE.

